21655162652 has 6 divisors (see below), whose sum is σ = 37896534648. Its totient is φ = 10827581324.

The previous prime is 21655162621. The next prime is 21655162681. The reversal of 21655162652 is 25626155612.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2706895328 + ... + 2706895335.

It is an arithmetic number, because the mean of its divisors is an integer number (6316089108).

Almost surely, 2^21655162652 is an apocalyptic number.

It is an amenable number.

21655162652 is a deficient number, since it is larger than the sum of its proper divisors (16241371996).

21655162652 is a wasteful number, since it uses less digits than its factorization.

21655162652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5413790667 (or 5413790665 counting only the distinct ones).

The product of its digits is 216000, while the sum is 41.

The spelling of 21655162652 in words is "twenty-one billion, six hundred fifty-five million, one hundred sixty-two thousand, six hundred fifty-two".